Hey, that was neat! I really liked the variety of monsters species, and I super appreciate the little landing intro cutscenes.

The one bummer was the boss laser: you may want to put a second or so of invincibility on your player after it's been hit, that way the boss laser won't drain all your health if it happens to line up just right!

I like the music and the animation of the spaceship landing. You don't know you're being hurt because (appart from the bottom left bar which is hard to see while you are kicking aliens' butts) there is no visual feedback (maybe a screen shake or flashing). Is hard to aim using the keyboard because the character keeps moving.